Improvement in grinding-mill attachments



C. V. STEVENS. Grinding-Mill Attachments.

No. 206,905. Patented Aug. 13,1878.

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UNITED STATES PATENT FFICE.

CHARLES V. STEVENS, OF SOMONAUK, ILL., ASSIONOR OF FOUR-FIFTHS OF HISRIGHT T() JOHN CLARK AND HARRISON VRIGHT, OF SAllIE PLACE.

IMPROVEMENT IN GRlNDlNG-MILL ATTACHMENTS.

Specification forming part of Letters Patent No. 206,905, dated August13, 1878; application tiled February 6, 1878.

To all whom it may concern:

Be it known that I, CHARLES V. STEVENS, of Somonauk, in the county of DeKalb and State of Illinois, have invented a new and useful Improvementin Windmill Attachments for GrindingMills, which is fully set forth inthe following specification, reference being had to the accompanyingdrawings, in which- Figure 1 represents a perspective view of agrindingmill and my improvement for communicating motion thereto 5 Fig.2, a vertical section on an enlarged scale through the driving-pulleyand grinding-disks; Fig. 3, an elevation of the inner face of theclutch-pulley with spring-pawl attached, and Fig. 4 a similar view ofthe ratchet-wheel on the grindingdisllt shaft, both latter views on anenlarged sca e.

The invention consists in certain combinations of special devices foraccomplishing the above-named purpose, all of which will be hereinaftermore fully set forth.

1n the drawings, A represents the pitman, which is attached to thecrank-shaft of the windmill, (not shown in the drawings,) and isintended to be connected to the piston-rod of the pump. Instead of thepitman itself, this may be a rod connected to the pitman, s o as topartake of the reciprocating motion of the latter.

A horizontal lever, B, is pivoted at one end to the frame-work of themill, or any other suitable support, as shown in Fig. 1 of the drawings,and the pitman or rod A is hinged to this lever at or near its centralpoint, the free end of the latter being extended out beyond the frame atone side thereof.

A shaft, C, is arranged conveniently below the outer end of the lever B,and is supported in suitable bearings, being arranged horizontally.

Grinding wheels or disks D may be arranged in relation to this shaft inthe usual manner, one of them being fixed thereon so as to revolve withthe shaft, and the other stationary.

A pulley, E, is mounted loosely on the shaft C, being provided with along hub, somewhat larger at the inner end than the outer, and providedwith a rim or flange, e, at this end,

as shown in Fig. 2 of the drawings. A pawl, F, is pivoted to the innerface of this loose pulley, and is provided with a spring, f, operatingto throw it outward in a way well known in connection with spring-pawls.

An internal ratchet-wheel, G, is xed upon the shaft G, adjacent to theface of the pulley E, so that the spring-pawl on the latter will bewithin the cup of the former, and will be caused to engage with theinternal teeth by its spring.

A band, H, is attached at one end to the perimeter of the ange e, aroundwhich it is wound, and the other end then carried up and fastened to theouter end of the lever B, as shown in full lines in Fig. l of thedrawings. A second band, I, is fastened at one end to the outer orsmaller portion of the hub of the loose pulley, and extended upward andattached at its upper end to the frame-work or any other rigid support,independent of the vibrating lever. This band I should be either ofelastic material, or should have an elastic section, fi, which may be aspring of any suitable construction, or some elastic material likerubber. The two bands or belts are arranged on opposite sides of thepulley, so that when one is wound upon the latter the other will beunwound.

Now, it is evident from the description above that, with everyreciprocation of the pitman occasioned by the revolution of thecrank-shaft belonging to the windmill, the lever B will be vibratedvertically, its outer end being alternately raised and depressed. Whenit is raised, as shown in dotted lines in Fig. 1 ofthe drawin gs,theband H will be drawn up, thereby giving a rotary movement to thepulley E; and the construction and arrangement of the pawl and ratchetare such that, when the pulley is thus rotated in the direction of thearrow in Fig. 1, the pawl is caused to engage with the ratchet, therebycausing the shaft and grind in g-disk to rotate with the pulley. Thisrotation of the pulley will evidently wind up the band I, therebystretching the spring or elastic section i; and as soon as the leverbegins to move in the opposite direction the contractile force of thissection will rotate the pulley backward in the opposite direction, andagain wind up the band II. In this movement the pawl slips back over theteeth of the ratchet, as usual in backing-ratchets, and therefore thereis very little resistance for the spring to overcome in the backwardrotation of the pulley. Of course, the shaft and grinding apparatus willremain stationary during this return movement; but an intermittentmotion will be given to the latter, which will answer very well forordinary grinding-mills upon farms, and for many other similar purposes.

If desired, gearing may be introduced for the purpose of giving suchspeed and direction to the movement ot' the machiner as may be desired.Notehes b may be provided in the outer end of the lever B, and the bandH attached to the latter by means ot' a loop, hook, or any other deviceadapted to the notches. When thus constructed the leverage may beregulated by changing from one notch to another, thereby changing alsothe distance to which the driving-band is drawn out.

As already stated, I do not confine myself to the adaptation ofthisimprovement to grinding-mills, for I propose to use it with othermachines where light rotary power is required, and thus utilize much ofthe power ot' windmills hitherto expended uselessly.

Instead of a spring or elastic section used in connection with the bandI, n weight or some other similar device may be employed for turningback the pulley.

In the application of the above-described iinprovement I obtain thefollowing advantages First, the leverage on the grinding-shaft is alwaysthe same during the entire stroke of the vibrating lever; second,dierent degrees of motion may be given to the grinding-surfaces with thesame windmill by reason of the adjustment of the driving-belt on itslever; third, the power derived from different-sized windmills may beutilized so as to give the grinding-surfaces a partial revolution, afull revolution, or more than a full revolution, to every revolution ofthe windmill, according to the size of the loose pulley and the lengthot' the driving-band.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The vibrating lever B, connected tothe windmill-pitman, in combinationwith the loose clutch-pulley E, driving-band H, retracting band I,ratchet-wheel G and grinding-disks D, all arranged and operatingsubstantially as described.

CHAS. V. STEVENS.

\\'itnesses:

